FDI对我国劳动力就业的影响   总被引：6，自引：0，他引：6  

葛公文 《世界地理研究》2003,12(2):68-73

自上世纪90年代起，我国劳动就业问题日趋严重。劳动力总量供大于求，隐性失业和显性失业并存，结构性和区域性就业矛盾突出。积极有效地治理和解决就业问题已成为政府的当务之急。本文把FDI作为应对严峻的就业问题的有效措施之一，探讨了我国城乡严峻的劳动力就业压力，FDI的飞速发展及其对劳动力就业的重要贡献，加入WTO后FDI对我国劳动力就业可能产生的影响。  相似文献   

试谈党员是思想政治工作的主力军     

马文瑞  毕秀莲 《山西气象》2002,(2):43-45

思想政治工作是我们党的优良传统和政治优势，是我们党的传家宝。党的性质决定了党员必须是思想政治工作的主力军；气象事业结构调整要求党员必须是思想政治工作的主力军；气象事业改革发展体现了党员是思想政治工作的主力军；气象事业可持续发展需要党员是思想政治工作的主力军。  相似文献   

Time-delay damping theory     

洪峰 《地震工程与工程振动(英文版)》2002,1(2):303-309

In this paper, existing damping theories are briefly reviewed. On the basis of the existing damping theories, a new kind of damping theory, i.e., the time-delay damping theory, is developed. In the time-delay damping theory, the damping force is considered to be directly proportional to the increment of displacement. The response analysis of an SDOF time-delay damping system is carried out, and the methods for obtaining the solution for a time-delay damping system in the time domain as well as the frequency domain are given. The comparison between results from different damping theories shows that the time-delay damping theory is both reasonable and convenient. Supported by: Key Project in Ninth Five-Year Plan of China Seismoligcal Bureau  相似文献   

作揖沱崩滑堆积体稳定性评价及防治对策   总被引：1，自引：0，他引：1  

简文星  张宜虎  尹红梅 《水文地质工程地质》2003,(Z1)

本文首先从地质背景、形态特征、滑面特征及水文地质等方面,对作揖沱崩滑堆积体的特征进行了概括。在总结已有研究成果的基础上,将降雨对斜坡稳定性的影响进行了定量确定,并在剩余推力法公式和程序中加入这些量化关系,对剩余推力法进行了改进。然后用试验、参数反演及综合经验等方法确定了作揖沱崩滑堆积体稳定性计算的参数,采用改进的剩余推力法与Sarma法对其进行稳定性计算,结果表明:降雨与库水位的提升对作揖沱崩滑堆积体稳定性的影响较大。最后,根据作揖沱崩滑堆积体失稳可能产生的危害,提出了相应的防治对策。  相似文献   

重力式水泥搅拌桩挡墙在深基坑支护工程中的应用研究   总被引：1，自引：0，他引：1  

钱同辉  文兵  齐甦 《水文地质工程地质》2003,(Z1)

本文从水泥搅拌桩与软土之间的物理化学反应过程以及水泥搅拌桩的力学特性两方面,分析了重力式水泥搅拌桩支护技术的作用机理,归纳分析了重力式水泥搅拌桩挡土墙的设计方法和施工技术特点。结合工程实例,对重力式水泥搅拌桩挡土墙的土压力计算、墙体稳定性验算等方面进行了探讨,对比分析了公式计算与电算结果,同时体会到深基坑支护工程除了优化设计外,采用信息化施工,对工程进行监测,及时反馈信息指导施工是工程成功的关键之一。实例表明无支撑重力式水泥搅拌桩挡墙作为7m以内基坑的围护结构具有显著的优越性,值得推广运用。  相似文献   

FORMATION OF LARGE-SCALE TECTONIC ELEMENTS FROM THE POSITION OF CENTRIFUGAL-INERTIAL FORCE ACTION     

Molchanov Ⅴ. Ⅰ  Paraev Ⅴ. Ⅴ 《大地构造与成矿学(英文版)》2005,29(1):13-33

We describe the earlier unknown, when applied to global tectonics, centrifugal inertial mechanism of lithosphere plate moving under the effect of forces appearing as a result of Earth‘s planetary rotation. The mechanism stated gives an insight into global tectonics of plates with the indirect participation of emanation streams which, in their turn, are the derivatives of centrifugal and inertial forces of planetary motion. The application of this mechanism provides a logical explanation for the regularities of global tectogenesis including the formation of mountain ridges mainly of submeridional and sublatitudinal strike, and also the drift of continental plates from the east to the west and from the south to the north. The mechanism clarifies the significance of the Arctic and the Antarctic Circles as geodynamic barriers.  相似文献   

北京丰台区土地利用变化及其经济驱动力分析   总被引：14，自引：3，他引：14  

徐勇  马国霞  沈洪泉 《地理研究》2005,24(6):860-868

采用GIS技术和统计分析技术,基于1984、1992和1995～2001年土地利用图件和数据,分析了1984年以来北京丰台区土地利用变化历史过程及其空间分异特征。土地利用变化的基本特点是农业用地面积大幅度下降,非农用地面积快速增加,且随着时间的推移,变化高峰地域在由内向外传递。对1999年土地利用类型数据与经济产值数据匹配结果表明:土地经济产出效益巨大差异的存在是驱动丰台区土地利用从农业用地,尤其是耕地向非农业用地转化的最大动力所在。利用1992～2001年的非农业用地与固定资产投资、人口,二、三产业增加值进行的相关分析显示,固定资产投资、人口增长和第二产业的发展对非农业用地扩展有着显著的作用。  相似文献   

The five major changes in the evolution of the Loess Plateau     

ZHAO Jingbo 《地理学报》2005,15(4):475-483

On the basis of the geomorphology, paleosol, paleoclimate and loess age, major changes of the Loess Plateau were studied. There are five major changes in the evolution of the Loess Plateau in China. Among them, the first, second, third and fourth major changes have taken place since the formation of the Loess Plateau, and the fifth major change will happen in 100 years. The first major change, which occurred at about 2.50 Ma BP, was a transition from red earth plateau to the Loess Plateau, and reflects the climate from the warm-sub-humid to the alteration between cold-and-dry and warm-and-humid. The driving force of this first major change was climate. The second major change, which took place at about 1.60 Ma BP, was a vital transition of the main rivers in this area from non-existence to existence, and represented an important change on the Loess Plateau's neotectonic uplift from the slow rising to periodically accelerated rising, and making the river's erosion go from feeble to strong. The driving force of the second major change is tectonic uplift. The third major change which occurred at about 150 ka, was a great transition of the Yellow River's inpouring from a lake outlet to a sea outlet. At that time, the Yellow River cut the Sanmen Gorge. The transition led to the transformation of loess material from internal transportation to external transportation. The driving force of the third major change was running water erosion. The fourth one that occurred at about 1.1 ka was a change of the Loess Plateau from natural erosion to erosion accelerated by human influences. The driving force of the fourth major change is mainly human activities. The fifth major change, which is the opposite change to the fourth one, in which the motive power is human activity, too.  相似文献   

印尼某电站基桩的负摩阻力及其措施     

艾传井 《地质科技情报》2005,24(Z1):89-92

基于印尼某电站场地的工程地质条件,根据基桩负摩阻力的产生机理,分析确定了中性点的位置,计算了负摩阻力产生的下拉荷载;并结合膨润土泥浆护壁的作用机理,计算了采取较大直径预钻孔和膨润土泥浆护壁的措施后负摩阻力产生的下拉荷载.计算结果表明,前者大于单桩承载力设计值,因此不能采用预应力混凝土管桩方案;后者较前者显著降低,约为单桩承载力设计值的50%,因此可以采用预应力混凝土管桩方案.  相似文献   

单层鞍型网壳的抗震性能分析     

曹正罡  范峰 《世界地震工程》2004,20(2):55-60

采用子空间迭代法计算单层鞍型网壳的自振特性，利用圆管截面空间梁系弹塑性本构关系，用时程分析法计算单层鞍型网壳的弹塑性地震响应，通过对SDAP和ANSYS有限元程序计算结果比较分析，总结出单层鞍型网壳的自振特性、地震内力响应及地震内力系数随参数的变化规律。  相似文献